Freshwater Algal Bloom Prediction by Support Vector Machine in Macau Storage Reservoirs

Table 1

Correlation analysis of prediction and forecast model.

Parameters	Prediction model	Forecast model
		Time lagged (month)
		t-1	t-2	t-3
Turbidity	−0.03	0.00	−0.01	−0.06
Temperature	0.19	0.21	0.19	0.14
pH	𝟎.𝟒𝟗	𝟎.𝟒𝟐	𝟎.𝟑𝟖	𝟎.𝟑𝟑
Conductivity	−0.08	0.01	0.14	0.21
Cl^−	0.01	0.10	0.22	0.28
SO4^2−	−0.03	0.03	0.14	0.22
SiO2	𝟎.𝟑𝟑	𝟎.𝟑𝟏	0.16	0.04
Alkalinity	−𝟎.𝟑𝟒	−𝟎.𝟑𝟎	−0.21	−0.12
HCO3^−	−𝟎.𝟒𝟔	−𝟎.𝟒𝟎	−𝟎.𝟑𝟐	−0.24
DO	𝟎.𝟑𝟗	𝟎.𝟑𝟓	𝟎.𝟑𝟒	𝟎.𝟑𝟏
NO3^−	−0.29	−0.22	−0.22	−0.15
NO2^−	−0.10	−0.08	−0.02	0.03
NH4^+	0.11	0.10	0.08	0.25
TN	𝟎.𝟔𝟖	𝟎.𝟔𝟎	𝟎.𝟓𝟑	𝟎.𝟒𝟔
UV254	𝟎.𝟓𝟔	𝟎.𝟓𝟓	𝟎.𝟒𝟖	𝟎.𝟒𝟕
Fe	−0.14	−0.06	−0.04	−0.08
PO4^3−	0.02	0.06	0.06	0.03
TP	0.08	0.05	0.02	0.00
Suspended solid	𝟎.𝟑𝟏	𝟎.𝟑𝟓	𝟎.𝟑𝟏	0.23
TOC	𝟎.𝟑𝟖	𝟎.𝟑𝟑	0.29	𝟎.𝟑𝟓
HRT	−0.12	−0.11	−0.13	−0.16
Water level	0.13	0.05	0.01	−0.02
Precipitation	−0.09	0.05	0.11	0.06
Phytoplankton abundance	—	𝟎.𝟖𝟐	𝟎.𝟕𝟏	𝟎.𝟔𝟐